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Electromagnetic Waves 8th Grade
  • 1. Global Positioning System signals can tell you
A) your exact location on Earth
B) what television station you are tuned to
C) how many satellites are in orbit
D) who is sending a message to your cellphone
  • 2. Which waves have some electrical properties and some magnetic properties?
A) mechanical waves
B) longitudinal waves
C) electromagnetic waves
D) transverse waves
  • 3. Electromagnetic waves can transfer energy without a(n)
A) change in either a magnetic or an electric field
B) medium
C) electric field
D) magnetic field
  • 4. The range of electromagnetic waves placed in a certain order is called the
A) electromagnetic spectrum
B) electromagnetic wavelength
C) electromagnetic frequency
D) electromagnetic field
  • 5. Which model of light helps explain the photoelectric effect?
A) the electromagnetic model
B) the polarizing model
C) the particle model
D) the wave model
  • 6. FM signals travel as changes in
A) the speed of the wave
B) the loudness of the wave
C) the frequency of the wave
D) the amplitude of the wave
  • 7. On AM broadcasts, what remains constant?
A) the amplitude
B) the speech
C) the music
D) the frequency
  • 8. Which electromagnetic waves have the longest wavelengths and lowest frequencies?
A) ultraviolet waves
B) infrared waves
C) gamma rays
D) radio waves
  • 9. Light that has passed through a polarizing filter is called
A) white light
B) photoelectric light
C) polarized light
D) transverse light
  • 10. Visible light can be separated into various colors to form a(n)
A) MRI
B) X-ray picture
C) spectrum
D) thermogram
  • 11. What kind of waves do cellular telephones use to transmit and receive signals?
A) microwaves
B) ultraviolet rays
C) infrared rays
D) gamma rays
  • 12. The images made by an infrared camera are called
A) ultraviolet images
B) magnetic resonance images
C) thermograms
D) X-rays
  • 13. In the phenomenon known as the _________, electric current will flow when light shines on certain substances.
A) electromagnetic spectrum
B) electromagnetism
C) photoelectric effect
D) electricity
  • 14. Which letter shows the type of wave that can be seen by the human eye?
A) B
B) D
C) A
D) C
  • 15. What is the name of the type of wave labeled C?
A) ultraviolet rays
B) visible light
C) infrared rays
D) radar
  • 16. Which letter indicates X-rays?
A) D
B) A
C) B
D) C
  • 17. What type of wave that has the highest frequency?
A) microwave
B) x-rays
C) infrared rays
D) gamma rays
  • 18. What type of wave that has the the greatest energy?
A) gamma rays
B) x-rays
C) microwave
D) infrared rays
  • 19. What type of wave is labeled A?
A) ultraviolet
B) infrared
C) radio
D) visible light
  • 20. What is the object labeled as A?
A) radio waves
B) communications satellite
C) ground receiver
D) ground transmitter
  • 21. What is the object labeled B?
A) radio waves
B) communications satellite
C) ground receiver
D) ground transmitter
  • 22. What is the object labeled C?
A) ground transmitter
B) radio waves
C) communications satellite
D) ground receiver
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